M1 Mac 4.26 Compatibility Report

Development Platform & Builds Mobile
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Checking in with a new M1 Max MacBook Pro here. Here’s what I’ve found so far:

  • Using UE 4.27.1, it’s still quite crashy.
  • My existing project (created on Windows) loads some of the time, but either crashes or freezes the whole system (requiring a hard reboot).
  • However, starting a new project (Third Person) on the Mac seems to work fine.

Performance wise, here’s what I saw vs. my gaming PC (AMD Ryzen 5800X, GeForce 1050 Ti) at the same resolution and r.ScreenPercentage set to 100:

  • Using Play In Editor, the Third Person project ran at 128 fps on M1 vs. 180 fps on PC. This was disappointing.
  • However, when actually packaging up the project and running that, the M1 performed much better: with the game at 1080p, M1 got 240 fps (and seemed artificially capped) vs. 136 fps on PC. I don’t know where the fps limit is coming from, as it persisted even with t.MaxFPS set to 0 or a high number, and VSync off.
  • M1 can even render the game above 60 fps at 4K resolution.

I’m going to try some of the configuration adjustments people have recommended to see if I can get my existing project to stop crashing and freezing…

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4.27.1 & 4.27.2 work fine for me, on M1 Air. Haven’t had any issues since ~4.26, I adjusted the settings in my project though. (mentioned above)

Curious to know how things are going for you after making the adjustments?

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I confirm, all is working well with UE 4.27.2 from PC and Mini Mac M1 on iPad 12.9 (last model with M1 too), Xcode 13.2.1 and ipadOS 15.3.1…

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Still doing great in ue5! I no longer have to adjust project settings either :smile:

It’s very fast

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